Development of an atmosphere particle kinetic model for particle reactions in a combustion Flash-Reactor using CFD- methods. (August 2017)

• Record Type: Journal Article
• Authors: Edler, Franz; Geier, Bernhard; Reiter, Wolfgang; Rieger, Johannes; Spijker, Christoph; Raupenstrauch, Harald
• Is Part Of: Energy procedia. Volume 120(2017)
• Page Start: 540
• Page End: 547
• Publication Date: 2017-08
• Subjects: furnace modelling -- Flash-Reactor -- Eddy Dissipation Concept -- steel mill dusts -- Reco-Dust; Power resources -- Congresses; Power resources -- Periodicals; Power resources; Conference proceedings; Periodicals; 333.7905
• DOI: 10.1016/j.egypro.2017.07.200
• Languages: English
• ISSNs: 1876-6102

Abstract

Abstract: The Reco-Dust-Process offers new possibilities for minimum waste strategies in the iron industry. The idea was realized in the Flash-Reactor pilot plant, which is meant to recycle steel mill dusts and residues. The input material is separated into two usable fractions, an iron ore substitute and a zinc oxide rich dust. For a system scale-up the mathematic model was built to describe the process in CFD (Computational Fluid Dynamics) to support the research. The main process parameters are particle size and composition, gas composition, particle and gas temperature, burner and reactor geometry. With the "atmosphere particle kinetic model for particle reactions" it is possible to check the reactions in range of the calculation settings. First, a model for checking the user defined function of the gas and particle system was developed. Parcels with pre-calculated flue gas equilibrium compositions at certain temperatures are added in gas with fixed temperature and transported by the flue gas. With the rise of the temperature, heat and mass transfer of the particles are implied. In detail the behavior of the different parcel classes and the compositions over the residence time could be verified. Transition components are transferred to the gas phase and finally the evaluated "atmosphere particle kinetic model" is implemented in the main case. The main case contains the real geometry of the Flash-Reactor or possible upscaling geometries. An Eddy Dissipation Concept (EDC) is chosen for the combustion model. The calculation results are compared with experimental data.